Spring structure



W. R. SMITIM SPRING STRUCTURE.

APPLICATION FILED MAR. I. 1921.

Patented me. w21;

2 SHEETS-SHEET I.

if Jl .1..

W. R. SMITH. `SPRING STRUCTURE. APPLICATION FILED MAR. 1.

Patented Dec.

2 SHEETS-SHEET 2.

'WATSON R. SMITH, OF JACKSON, MICHIGAN.

spams s'rnUerUnE.

To all whom it may concern:

Be it known ythat I, 'WATSON R. SMITH, a citizen of the United States, residin at Jackson, in the county ofJaekson and tate of Michigan, have invented new and useful Im rovements in Spring Structures, of which the followingis a specification.

This invention relates to spring ,n structures. c v

One object of the invention is to provide a s' ring structure embodying a base frame strip to which the facing or skirt of the up- `holstering material may be readily tacked or otherwise secured and to which base frame stri the spring supporting bars may be rea ily sprung or snapped into detachable connection.

Anotherbject resides in the provision ofk a spring structure, embodying among other characteristics," a base frame composed of sheet metal and provided with a wood insert to which the lower edge of the side facing or ehrt of the upholstering material may be readily tacked and also provided with means whereby the spring supporting bars may be formed to provide for an effective detachable connection between the spring supporting V-loars andthe frame strip.

ith these and other objects in v iew, the invention consists in the construction and novel combination of parts hereinafter fully described, illustrated in the accompanying drawings'and pointed out in the claims hereto appended, it being understood that various changes 1n the form, proportion, si'ze and minor details of construction, within the scope ofthe appended claims, may be resort- -.ed to without departing from the spirit of the invention or sacrificing any of the advantages thereof.

lin the drawings v Figure' 1 is .ya transverse sectional view through a spring structure illustrating one embodiment o the1 iiventior. t

' i.2isa etai ra ena perspec ive viewgof this particularglialmbodiyment of the invention.

F ig. 3 is a transverse sectional view of a modified form of the invention.

Fig. 4 is a detail fragmentary perspective view of this second form of the invention.

Fig. 5 is a detail fragmentary perspective view of a third embodiment ofthe invention. Referring to the accompanying drawings, and more particularly to Figs. 1 and 2, the reference character 6 indicates a sheet metal Specification of Letters Patent.

Application filed March 1, 1921.

Patented nec. e, 192i. Serial No. 448,791.

base frame provided with a horizontallyl outwardly opening groove 7 adapted to recelve a wood insert 8 and to which the lower edge of the side facing 9 may be secured by means of tacks or other suitable `fastening elements 10. lt will be understood that the wood insert extends entirely around the base frame and. where the base frame corners are rounded, the wood insert may be properly secured in place by a. steaming or wetting process to which the wood insert may be subjected.

The .-base frame strip may vhave an inwardly opening comparatively shallow groove 11 into which is adapted to be sprung or snapped a rib 12 carried by the hook 13 at each end of the spring supporting bars 14 upon which latter the springs 15 are mounted in any suitable manner, one way being to provide the bars 14A with a raised rib 16 and strlke up or otherwise provide therein the eyes 17 to receive the lower convolutions of the springs. y

rlhe hooks 13 of the bars 14 overhang the upper edge of the base frame strip as shown and these hooks have a more or less snug connection with both sides of the upper portion of the base frame strip with the ribs 12 of the hooks fitting tightly in the in' wardly opening groove 11. That portion of each hook beneath the rib 12 lies Hat or fiush against the inner face of the outwardly opening groove 7 so as to provide for a substantial support for the ends of the spring supporting bars 14.

Referring to F igs.' 3 and 4 of the accompanying drawings, there is a slightly different construction involved. For instance, the base frame strip 6' has the upper groove 18 opening outwardly for the reception of a rib 19 carried by the hooks 13', these hooks 13 overhanging the upper edge of the base frame strip, as in the rst form of the invention, and constructed whereby the ribs 19 are adapted to spring into the outwardly opening grooves 18 in the same manner and for the same purpose as in the case of the ribs 12 of the hooks 13 with relation to the inwardly opening groove 11 in the first form described. z In this second embodiment of the invention, the wood insert 8 is disposed rearwardly or inwardly of the body of the base frame strip rather than outwardly thereof as shown in the first form described. The hooks 13 are therefore formed so as to proreceive the' wood insert 2 2 1n a manner s1milar to the other forms described and this base frame strip also has an .foutwardly opening groove 23 adapted tov receive the rib 24 of the hooks 13a. In this embodiment of the invention, the hooks are not formed as nearly U-shaped asin the other two forms of the invention described but on the other hand take a formation more on the order of inverted V-shape, and the inner sides of the' hooks 13a extend from the upper edge of the base frame strip 7 a. upon an incline downwardly over the upper rear corner of the wall .of 'the groove which receives the wood insert 22 and downwardly beyond the latter to a point substantially in alinement with the lower wall of the wood insert groove, as clearly shown in Fig. 5. The principle of operation with regard to this last embodiment of the invention is the same as in the other forms of the invention, the hooks being snapped or sprung into engagement with the base frame strip.

What is claimed is 1. In a spring structure, a base frame provided with upper and lower grooves, a wood insert in the lower groove, and a supporting bar provided with a hook at each end,

with each hook provided with a rib adapted' edgeA of the base frame strip and provided with means adapted to be sprung into co oove of the active relation with the upper base frame strip, whereby to e ect a -detachable connection between the supporting bar and the base frame strip.

3. In a spring structure, a base frame composed of sheet metal and provided with a groove, a wood insert in the groove, and a spring supporting bar provided .with a hook,

ateach end adapted to overhang the upper edge of the base frame strip, the base frame strip and the hooks of said bar being provided with interlocking connections` whereby to eect a snapping connection between the same and permit of detachable relation.

4. In a spring structure, a base frame composed of sheet metal and provided with a groove, a wood insert in the oove, and a spring supporting bar provide with a hook at each end for connection with the strip, the strip and the hooks of the bar being provided with interlocking connections whereby to effect a. snapping connection between the same and yet permit of detachable relation and also of an adjustment of the bar along the strip.

In testimony whereof I have hereunto aixed my signature.

WATSON R. SMITH. 

